Photochemically induced [2 + 2] cycloaddition of a silacyclopentadiene with carbon disulfide
A silacyclopentadiene (silole) undergoes photo-induced [2+2] cycloaddition with CS2 to afford the corresponding β-dithiolactones. The electron transfer from singlet excited state of the silole to CS2 is shown to play an important role in the cycloaddition reaction.